V4L/DVB (9078): gspca: New exported function to retrieve the current frame buffer.

Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c
index e4c9989..4694dc1 100644 (file)
--- a/drivers/media/video/gspca/gspca.c
+++ b/drivers/media/video/gspca/gspca.c
@@ -102,6 +102,22 @@ static struct vm_operations_struct gspca_vm_ops = {
        .close          = gspca_vm_close,
 };
 
+/* get the current input frame buffer */
+struct gspca_frame *gspca_get_i_frame(struct gspca_dev *gspca_dev)
+{
+       struct gspca_frame *frame;
+       int i;
+
+       i = gspca_dev->fr_i;
+       i = gspca_dev->fr_queue[i];
+       frame = &gspca_dev->frame[i];
+       if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS)
+                               != V4L2_BUF_FLAG_QUEUED)
+               return NULL;
+       return frame;
+}
+EXPORT_SYMBOL(gspca_get_i_frame);
+
 /*
  * fill a video frame from an URB and resubmit
  */
@@ -110,7 +126,7 @@ static void fill_frame(struct gspca_dev *gspca_dev,
 {
        struct gspca_frame *frame;
        __u8 *data;             /* address of data in the iso message */
-       int i, j, len, st;
+       int i, len, st;
        cam_pkt_op pkt_scan;
 
        if (urb->status != 0) {
@@ -124,11 +140,8 @@ static void fill_frame(struct gspca_dev *gspca_dev,
        for (i = 0; i < urb->number_of_packets; i++) {
 
                /* check the availability of the frame buffer */
-               j = gspca_dev->fr_i;
-               j = gspca_dev->fr_queue[j];
-               frame = &gspca_dev->frame[j];
-               if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS)
-                                       != V4L2_BUF_FLAG_QUEUED) {
+               frame = gspca_get_i_frame(gspca_dev);
+               if (!frame) {
                        gspca_dev->last_packet_type = DISCARD_PACKET;
                        break;
                }
@@ -185,7 +198,6 @@ static void bulk_irq(struct urb *urb
 {
        struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
        struct gspca_frame *frame;
-       int j;
 
        PDEBUG(D_PACK, "bulk irq");
        if (!gspca_dev->streaming)
@@ -199,11 +211,8 @@ static void bulk_irq(struct urb *urb
        }
 
        /* check the availability of the frame buffer */
-       j = gspca_dev->fr_i;
-       j = gspca_dev->fr_queue[j];
-       frame = &gspca_dev->frame[j];
-       if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS)
-                               != V4L2_BUF_FLAG_QUEUED) {
+       frame = gspca_get_i_frame(gspca_dev);
+       if (!frame) {
                gspca_dev->last_packet_type = DISCARD_PACKET;
        } else {
                PDEBUG(D_PACK, "packet l:%d", urb->actual_length);

diff --git a/drivers/media/video/gspca/gspca.h b/drivers/media/video/gspca/gspca.h
index 78a35a8..72a2885 100644 (file)
--- a/drivers/media/video/gspca/gspca.h
+++ b/drivers/media/video/gspca/gspca.h
@@ -178,6 +178,7 @@ struct gspca_frame *gspca_frame_add(struct gspca_dev *gspca_dev,
                                    struct gspca_frame *frame,
                                    const __u8 *data,
                                    int len);
+struct gspca_frame *gspca_get_i_frame(struct gspca_dev *gspca_dev);
 #ifdef CONFIG_PM
 int gspca_suspend(struct usb_interface *intf, pm_message_t message);
 int gspca_resume(struct usb_interface *intf);